Ambulacraria is a clade of invertebrate phyla which includes echinoderms and hemichordates; a member of this group is called an ambulacrarian. The Ambulacraria are part of the Deuterostomes, a larger clade that also includes the Chordata and Vetulicolia. The two living phyla with representative organisms are: The phylum Xenoturbellida (two species...
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